a new type of investigation after the sandy hook shooting. geneticists are studying adam lanza's dna. they say there are genetic components to mental a list of many factors involved. scientists are not looking for anything specific and they admit it is unlikely they will find anything. the result will likely not be released for several weeks. after the shooting spree there have been plenty of questions about school safety. that is why hundreds of staff members at utah school turned out last night for free gun training. everyone from third grade teachers to janitors and cafeteria workers were taught how to fight back in a situation like that at sandy hook. >> i am just were read a little bit, what would i do as a teacher. how would you protect yourself if you were being fired upon? >> with the recent tragedy, i realize it is probably a good time for me to act on that. >> trainers and that advocates said not every teacher who showed up applied for or even wanted a gun permit, but they said the purpose of the training was to help people learn ab